Certain transients require regular observations over several days at intervals of hours or shorter,which cannot be accomplished by telescopes at a single site.The deployment of globally distributed telescopes at geogr...Certain transients require regular observations over several days at intervals of hours or shorter,which cannot be accomplished by telescopes at a single site.The deployment of globally distributed telescopes at geographic locations of different longitudes enables the periodic monitoring of transients through relay observation.However,the simultaneous relay observation of numerous targets requires a telescope array of multiple telescopes that can be efficiently coordinated,and an automated scheduler for the array.This paper proposes IPROS,an integer programming model relay observation scheduler for a telescope array,that accounts for the entire process of relay observation and is consistent with the practical scenarios.We introduce the integer programming mathematical model for the relay observation scheduling problem with the telescope array,upon which the scheduler is based.Additionally,we propose an algorithm to provide a comprehensive formulation of the optimization objective of minimizing cadence deviation in the model.Experimental results demonstrate that the relay observation scheduler based on the integer programming model can effectively address the telescope array relay observation problem.It shows superiority over a scheduler with non-specific consideration of relay observation in the modeling and a scheduler based on greedy thought.展开更多
The scientific research mission of the Survey Space Telescope(also known as the China Space Station Telescope,CSST)imposes rigorous requirements on the observation precision.However,microvibrations generated by the sh...The scientific research mission of the Survey Space Telescope(also known as the China Space Station Telescope,CSST)imposes rigorous requirements on the observation precision.However,microvibrations generated by the shutter mechanism can seriously affect the performance of the highly precise and sensitive instruments onboard.This study presents a dynamic model and verifies its performance using experimental results.Indeed,a five-degreeof-freedom nonlinear dynamic model that considers all interference sources and bearing nonlinearity is established.The validity of the proposed model is verified using experimental measurements of the microvibration characteristics.The obtained results proved that the proposed dynamic model can accurately predict the characteristics of the microvibrations caused by the shutter mechanism in the design stage and provide a theoretical basis for the development of CSST.展开更多
基金supported by the National Key Research and Development Program of China No.2023YFA1608301the National Natural Science Foundation of China(NSFC,grant Nos.12133010 and 12273025)
文摘Certain transients require regular observations over several days at intervals of hours or shorter,which cannot be accomplished by telescopes at a single site.The deployment of globally distributed telescopes at geographic locations of different longitudes enables the periodic monitoring of transients through relay observation.However,the simultaneous relay observation of numerous targets requires a telescope array of multiple telescopes that can be efficiently coordinated,and an automated scheduler for the array.This paper proposes IPROS,an integer programming model relay observation scheduler for a telescope array,that accounts for the entire process of relay observation and is consistent with the practical scenarios.We introduce the integer programming mathematical model for the relay observation scheduling problem with the telescope array,upon which the scheduler is based.Additionally,we propose an algorithm to provide a comprehensive formulation of the optimization objective of minimizing cadence deviation in the model.Experimental results demonstrate that the relay observation scheduler based on the integer programming model can effectively address the telescope array relay observation problem.It shows superiority over a scheduler with non-specific consideration of relay observation in the modeling and a scheduler based on greedy thought.
基金financial support for the CSST Survey Camera from the China Manned Space Program through its Space Application System。
文摘The scientific research mission of the Survey Space Telescope(also known as the China Space Station Telescope,CSST)imposes rigorous requirements on the observation precision.However,microvibrations generated by the shutter mechanism can seriously affect the performance of the highly precise and sensitive instruments onboard.This study presents a dynamic model and verifies its performance using experimental results.Indeed,a five-degreeof-freedom nonlinear dynamic model that considers all interference sources and bearing nonlinearity is established.The validity of the proposed model is verified using experimental measurements of the microvibration characteristics.The obtained results proved that the proposed dynamic model can accurately predict the characteristics of the microvibrations caused by the shutter mechanism in the design stage and provide a theoretical basis for the development of CSST.
